CN108712071A - A kind of DC/DC power circuits, the power supply comprising the circuit and its application - Google Patents
A kind of DC/DC power circuits, the power supply comprising the circuit and its application Download PDFInfo
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- CN108712071A CN108712071A CN201810584980.2A CN201810584980A CN108712071A CN 108712071 A CN108712071 A CN 108712071A CN 201810584980 A CN201810584980 A CN 201810584980A CN 108712071 A CN108712071 A CN 108712071A
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- input
- power
- switch pipe
- terminal
- switching tube
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- 239000000446 fuel Substances 0.000 claims abstract description 31
- 239000004065 semiconductor Substances 0.000 claims description 25
- 230000005611 electricity Effects 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 abstract description 5
- 210000004027 cell Anatomy 0.000 description 39
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 206010068052 Mosaicism Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/30—The power source being a fuel cell
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a kind of DC/DC power circuits, the power supply comprising the circuit and its applications, present invention can apply to photovoltaic fuel cell hybrid generation systems, it is contemplated that DC/DC power circuit point two-stages form, the H bridge type input power structure that prime is made of two direct-current input power supplyings, rear class are DC/DC inverter power units；H bridge input power modules include three switching tubes, the power supply working condition for flexibly switching distributed generation system；DC/DC inverter power units, for be converted into the DC voltage of two input terminal can be by the matched high voltage direct current of DC bus；The present invention can improve the capacity usage ratio of distributed photovoltaic power generation system, save the operating cost of electricity generation system.
Description
Technical field
The present invention relates to DC/DC power circuits, more particularly to are applied to the DC/DC of photovoltaic fuel cell hybrid generation system
Unit.
Background technology
With greatly developing for renewable energy power generation technology, independent distributed generation system is increasingly becoming satisfaction on the spot
Load growth demand, a kind of new effective solution for reducing environmental pollution, improving comprehensive utilization rate of energy source and power supply reliability
Scheme.
Nowadays distributed photovoltaic power is increasingly favored by market, and application scenario is more and more.But due to photovoltaic
There is intermittent and fluctuation in power supply, when it being caused not know and generate electricity there are generated output as distributed generation resource
Between do not know etc. deficiency.In addition when photovoltaic generation voltage is very low, generated output can not be used by DC bus end,
Cause photovoltaic generating system exist it is certain abandon electrical phenomena, this has also resulted in current distributed photovoltaic power generation there are the energy comprehensive
The not high situation of utilization rate is closed, the optimal energy transformation ratio of photovoltaic generation is cannot achieve.
Invention content
In view of the above-mentioned problems, the present invention provides a kind of DC/DC power circuits, the power supply comprising the circuit and applies the power supply
Photovoltaic fuel cell hybrid generation system, the system can either simultaneously powering load, and can it is independent as power supply electricity
Distinguish powering load in source.System solves the problem existing intermittent during simple photovoltaic cell capable of generating power and fluctuation sex chromosome mosaicisms；
Simultaneously, moreover it is possible to promote the global voltage of input supply terminal, successfully utilize the low pressure importation of photovoltaic generation, reduce photovoltaic electric
Electrical phenomena is abandoned in source, improves the comprehensive utilization ratio of generated energy.
To achieve the above object, the present invention takes following technical scheme：
A kind of DC/DC power circuits, including first switch pipe, second switch pipe, third switching tube and DC/DC converters；
The input positive terminal of DC/DC converters, the conducting electric current outflow end of first switch pipe, first switch pipe conducting electric current flow into end,
The conducting electric current inflow end of second switch pipe, the conducting electric current stream of the conducting electric current outflow end of second switch pipe, third switching tube
Outlet, the conducting electric current of third switching tube flow into end and the input negative terminal of DC/DC converters is sequentially connected with, first switch pipe
Conducting electric current flows into the first input positive terminal that end is DC/DC power circuits, and the input negative terminal of DC/DC converters is DC/DC
The input positive terminal of first input negative terminal of power circuit, DC/DC converters is the second input positive terminal of DC/DC power circuits,
The conducting electric current outflow end of third switching tube is the second input negative terminal of DC/DC power circuits, the output of DC/DC converters
Anode is the output plus terminal of DC/DC power circuits, and the output negative terminal of DC/DC converters is the output of DC/DC power circuits
Negative terminal；The control terminal of first switch pipe, second switch pipe and third switching tube is used for each switching tube on or off of input control
Control signal.
Preferably, first switch pipe, second switch pipe and third switching tube are metal-oxide-semiconductor.
Preferably, first switch pipe, second switch pipe and third switching tube are managed for IGBT.
Preferably, the input and output of DC/DC converters are 10 times or more voltage multiple proportions.
The present invention also provides the power supply of application foregoing circuit, the first input positive terminal of foregoing circuit, the first input negative terminal, the
Two input positive terminals, the second input negative terminal, output plus terminal, the control for exporting negative terminal, the control terminal of first switch pipe, second switch pipe
The control terminal of end processed and third switching tube is 9 terminals of power supply.
The present invention also provides the photovoltaic fuel cell hybrid generation system of application foregoing circuit, the first input positive terminal connects light
The anode of battery is lied prostrate, the first input negative terminal connects the cathode of photovoltaic cell, and the second input positive terminal connects the anode of fuel cell,
Second input negative terminal connects the cathode of fuel cell, and output plus terminal connects the anode of DC bus, and output negative terminal connection direct current is female
The cathode of line.
The present invention photovoltaic fuel cell hybrid generation system be contemplated that DC/DC power circuit point two-stages form, prime by
The H bridge type input power structure that two direct-current input power supplyings are constituted, rear class are DC/DC inverter power units；H bridges input electricity
Source module includes three switching tubes, the power supply working condition for flexibly switching distributed generation system；DC/DC becomes
Parallel operation power cell, for be converted into the DC voltage of two input terminal can be by the matched high voltage direct current of DC bus.
Term is explained：
The control terminal of switching tube：The port of control switch conduction and cut-off refers to the grid of metal-oxide-semiconductor such as metal-oxide-semiconductor
Pole；For triode, the base stage of triode is referred to.
The conducting electric current of switching tube flows into end：After switch conduction, the port that electric current flows into refers to such as metal-oxide-semiconductor
The drain electrode of MOS pipes, no matter N-channel, P-channel, enhanced or depletion type MOS tube, conducting when, electric current is all by voltage height
Drain electrode flow to the low source electrode of voltage；For triode, the collector of triode is referred to, in conducting, electric current is by voltage
High collector flows to the low emitter of voltage.
The conducting electric current outflow end of switching tube：After switch conduction, the port of electric current outflow refers to such as metal-oxide-semiconductor
The source electrode of MOS pipes；For triode, the emitter of triode is referred to.
H bridge type input power：The bridge-type input structure being made of two direct-current input power supplyings, since circuitry shapes exactly like word
Female H, therefore the application is named as " H bridges " formula input power.H bridge type input power concrete structure is：First direct-current input power supplying
It is composed in series first both ends sub-network with first switching tube, the anode of first direct-current input power supplying is first two
The anode of terminal network, the cathode of first direct-current input power supplying are the cathode of first both ends sub-network；Second direct current
Input power and second switching tube are composed in series second both ends sub-network, and the anode of second direct-current input power supplying is
The anode of second both ends sub-network, the cathode of second direct-current input power supplying are the cathode of second both ends sub-network；The
The anode of one both ends sub-network is connected with the anode of second both ends sub-network, the cathode of first both ends sub-network and the
The cathode of two both ends sub-networks is connected；The tie point of first direct-current input power supplying and first switching tube and second it is straight
It is connected with third switching tube between stream input power and the tie point of second switching tube；First both ends sub-network and
The position relationship of direct-current input power supplying and switching tube in two both ends sub-networks is cross arrangement.
Compared with prior art, the present invention has the advantages that：
1, the present invention provides a kind of DC/DC power circuits applied to photovoltaic fuel cell hybrid generation system, Ke Yirang
Photovoltaic generating system and fuel cell system are powered as independent functional unit to output loading.Make photovoltaic generating system
It, can be in real time by fuel electricity when the photovoltaic generation energy cannot individually meet workload demand in generated energy deficiency or overload
Pond is linked into power-supply system, it is allowed to supplement the energy as the power supply of peak load；When photovoltaic generating system can not normal work
When making, can circuit of the present invention can allow fuel cell separately as supply unit give DC bus energize；When illumination abundance,
When the photovoltaic generation energy meets workload demand, the real-time off-grid of fuel cell powered unit can be allowed, make photovoltaic generation unit independent
It is energized to DC bus as supply unit, meets workload demand.Therefore the present invention provides the distribution power circuit sides DC/DC
Not only working method is very flexible for case, but also can ensure the functional reliability of entire energy resource system.
2, the generated energy when present invention can utilize distributed photovoltaic power generated energy less.When photovoltaic power generation quantity very
It is few, when output voltage is very low, when photovoltaic system cannot be energized independently as supply unit to DC bus；Present system can
DC bus powered by photo-voltaic power supply and fuel cell power source series connection, it integrally to be given as supply unit, photovoltaic is sent out at this time
The electric energy that electric system generates can be utilized by DC bus.Therefore present invention also improves distributed photovoltaic power generation systems
Capacity usage ratio saves the operating cost of electricity generation system.
Description of the drawings
Fig. 1 is the structure chart that DC/DC power circuits of the present invention are applied to photovoltaic fuel cell hybrid systems；
Fig. 2 is 1 schematic diagram of operation mode of the present invention；
Fig. 3 is 2 schematic diagram of operation mode of the present invention；
Fig. 4 is 3 schematic diagram of operation mode of the present invention.
Specific implementation mode
Referring to Fig. 1, the structure chart of photovoltaic fuel cell hybrid generation system is applied to for DC/DC power circuits of the present invention.
System includes photovoltaic cell V1, fuel cell V2, metal-oxide-semiconductor S5, metal-oxide-semiconductor S6, metal-oxide-semiconductor S7, a height with ten times or more
Gain DC/DC converters and DC bus.
The DC/DC converters that present embodiment is selected are the converter for having high-gain performance, input and output up to 10 times with
The low-voltage direct of photovoltaic cell in distributed generation resource and fuel cell can so be come in and gone out and be transformed into high straightening by upper voltage multiple proportions
Stream, realizes larger input and output voltage multiple proportions, is transferred in DC bus with this by distributed power generating source is smooth,
Meet the burden requirement of whole system.
Fig. 1 connection relations are：Photovoltaic cell V1, fuel cell V2, metal-oxide-semiconductor S5, metal-oxide-semiconductor S6 and metal-oxide-semiconductor S7 form H bridges
Formula input power, the anode of the drain electrode connection photovoltaic cell V1 of metal-oxide-semiconductor S6, the source electrode connection fuel cell V2 of metal-oxide-semiconductor S6 is just
Pole, the drain electrode of the cathode connection metal-oxide-semiconductor S7 of photovoltaic cell V1, the source electrode of the cathode connection metal-oxide-semiconductor S7 of fuel cell V2, metal-oxide-semiconductor
The cathode of the source electrode connection fuel cell V2 of S5, the anode of the drain electrode connection photovoltaic cell V1 of metal-oxide-semiconductor S5；DC/DC converters
Input positive terminal connects the anode of fuel cell V2, the cathode of the input negative terminal connection photovoltaic cell V1 of DC/DC converters, DC/DC
The anode of the output plus terminal connection DC bus of converter, the cathode of the output negative terminal connection DC bus of DC/DC converters.
The specific working mode of the present invention is as follows.
Operation mode 1：As shown in Fig. 2, when illumination is sufficient, the energy that photovoltaic cell V1 is generated is enough to support whole system
Metal-oxide-semiconductor S is controlled when workload demand at this time5、S7It is in off state, metal-oxide-semiconductor S6It is in the conduction state.Inputted in H bridge type
In power module, photovoltaic cell V1 is independently linked into rear class DC/DC converters to DC bus powered.
Operation mode 2：As shown in figure 4, controlling metal-oxide-semiconductor S at this time5, S6It is in off state, metal-oxide-semiconductor S7It is on
State.Photovoltaic cell does not generate energy and is in off-line state at this time, therefore entire input power system is only by fuel cell list
The energy transmission that only input power as rear class DC/DC converter modules stores fuel cell ensures power supply to load end
The stability of system.
Operation mode 3：As shown in figure 4, controlling metal-oxide-semiconductor S at this time6, S7It is in off state, metal-oxide-semiconductor S5It is on
State.The supply voltage of photo-voltaic power supply generation at this time is relatively low to give output loading to supply by the way that DC/DC converter modules are independent
Electricity, therefore by photo-voltaic power supply and fuel cell series, promote input supply voltage；By the integrally conduct of photovoltaic cell and fuel cell
The input terminal of rear class DC/DC converter modules, i.e., input terminal voltage is current photovoltaic generation voltage and fuel battery voltage at this time
The sum of.Respective energy is transmitted to load end by photovoltaic voltage together with fuel cell by DC/DC converter modules.
The implementation of the present invention is not limited to this, and the above according to the invention is known using the ordinary skill of this field
Knowledge and customary means, under the premise of not departing from the technology of the present invention design, specific implementation circuit can also make it in the present invention
Metal-oxide-semiconductor in embodiment is replaced with IGBT by the modification, replacement or change of its diversified forms such as in high-power applications occasion
Pipe, all falls within the claims in the present invention protection domain.
Claims (6)
1. a kind of DC/DC power circuits, it is characterised in that：Including first switch pipe, second switch pipe, third switching tube and DC/
DC converters；The electric conduction of the input positive terminal of DC/DC converters, the conducting electric current outflow end of first switch pipe, first switch pipe
Stream flows into end, the conducting electric current of second switch pipe flows into end, the conducting electric current outflow end of second switch pipe, third switching tube are led
The input negative terminal of galvanization outflow end, the conducting electric current inflow end of third switching tube and DC/DC converters is sequentially connected with, and first opens
The conducting electric current for closing pipe flows into the first input positive terminal that end is DC/DC power circuits, and the input negative terminal of DC/DC converters is
The input positive terminal of first input negative terminal of DC/DC power circuits, DC/DC converters is the second input of DC/DC power circuits
The conducting electric current outflow end of anode, third switching tube is the second input negative terminal of DC/DC power circuits, DC/DC converters
Output plus terminal is the output plus terminal of DC/DC power circuits, and the output negative terminal of DC/DC converters is DC/DC power circuits
Export negative terminal；The control terminal of first switch pipe, second switch pipe and third switching tube for the conducting of each switching tube of input control or
The control signal of shutdown.
2. DC/DC power circuits according to claim 1, it is characterised in that：First switch pipe, second switch pipe and third
Switching tube is metal-oxide-semiconductor.
3. DC/DC power circuits according to claim 1, it is characterised in that：Preferably, first switch pipe, second switch
Pipe and third switching tube are managed for IGBT.
4. DC/DC power circuits according to claim 1, it is characterised in that：The input and output of DC/DC converters are 10 times
The above voltage multiple proportions.
5. a kind of power supply using any one of Claims 1-4 DC/DC power circuits, it is characterised in that：DC/DC power supplys
First input positive terminal of circuit, the first input negative terminal, the second input positive terminal, the second input negative terminal, output plus terminal, output negative terminal,
The control terminal of the control terminal of first switch pipe, the control terminal of second switch pipe and third switching tube is 9 terminals of power supply.
6. a kind of photovoltaic fuel cell hybrid generation system using any one of Claims 1-4 DC/DC power supplys, special
Sign is：First input positive terminal connects the anode of photovoltaic cell, and the first input negative terminal connects the cathode of photovoltaic cell, the second input
Anode connects the anode of fuel cell, and the second input negative terminal connects the cathode of fuel cell, and output plus terminal connects DC bus
Anode, the cathode of output negative terminal connection DC bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810584980.2A CN108712071A (en) | 2018-06-08 | 2018-06-08 | A kind of DC/DC power circuits, the power supply comprising the circuit and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810584980.2A CN108712071A (en) | 2018-06-08 | 2018-06-08 | A kind of DC/DC power circuits, the power supply comprising the circuit and its application |
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| Publication Number | Publication Date |
|---|---|
| CN108712071A true CN108712071A (en) | 2018-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810584980.2A Withdrawn CN108712071A (en) | 2018-06-08 | 2018-06-08 | A kind of DC/DC power circuits, the power supply comprising the circuit and its application |
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| CN (1) | CN108712071A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541391A (en) * | 2020-05-15 | 2020-08-14 | 西安交通大学 | Cross double-PV-source input-stage-connected multi-level inverter circuit |
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| CN205811557U (en) * | 2016-07-13 | 2016-12-14 | 保定英利分布式能源股份有限公司 | Grid-connected superposition electricity generation system for communication base station |
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| CN207265694U (en) * | 2017-08-15 | 2018-04-20 | 宁夏黑金昊源绿能科技有限公司 | Voltage switching output device and system |
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| CN208424199U (en) * | 2018-06-08 | 2019-01-22 | 广州金升阳科技有限公司 | A kind of DC/DC power circuit, the power supply comprising the circuit and its application |
-
2018
- 2018-06-08 CN CN201810584980.2A patent/CN108712071A/en not_active Withdrawn
Patent Citations (6)
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| US20150381074A1 (en) * | 2013-07-29 | 2015-12-31 | Rhombus Energy Solutions, Inc. | Dc source-to-ac grid tie-in power enhancement using multilevel/multiphase inverter topology and resonant matrix tank converter |
| CN205811557U (en) * | 2016-07-13 | 2016-12-14 | 保定英利分布式能源股份有限公司 | Grid-connected superposition electricity generation system for communication base station |
| CN207117287U (en) * | 2017-07-31 | 2018-03-16 | 惠州市蓝微新源技术有限公司 | A kind of battery pack serial and parallel switching circuit |
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| CN108116350A (en) * | 2018-01-08 | 2018-06-05 | 卢浩义 | Vehicle-mounted assembled battery intelligent power supply electric system and method for supplying power to |
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| CN111541391A (en) * | 2020-05-15 | 2020-08-14 | 西安交通大学 | Cross double-PV-source input-stage-connected multi-level inverter circuit |
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Application publication date: 20181026 |